package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService  workspaceService;

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        // 用集合存放begin到end范围内的每天的日期
        List<LocalDate> dateList =new ArrayList<>();

        dateList.add(begin);//加入开始一天
        //将begin+1后面到end全加进去
        while(!begin .equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate local : dateList) {
            //查询Date时间对应的营业额,状态为5(已完成)的订单
            LocalDateTime beginTime = LocalDateTime.of(local, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(local, LocalTime.MAX);
            //将数据封装到map集合里
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }


        //假设 dateList 的内容是
        // ["2023-10-01", "2023-10-02", "2023-10-03"]，
        // 那么最终生成的 TurnoverReportVO
        // 对象的 dateList 属性值将是
        //"2023-10-01,2023-10-02,2023-10-03"
        return TurnoverReportVO.builder()
                        .dateList(StringUtils.join(dateList,","))
                        .turnoverList(StringUtils.join(turnoverList,","))
                        .build();
    }

    /**
     * 指定时间用户数据
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        // 用集合存放begin到end范围内的每天的日期
        List<LocalDate> dateList =new ArrayList<>();

        dateList.add(begin);//加入开始一天
        //将begin+1后面到end全加进去
        while(!begin .equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的用户数量
            //每日新增用户量 sql: select count(id) from user where create_time < ?  and create_time >?
        List<Integer> newUserList = new ArrayList<>();
            //每日总用户量 sql: select count(id) from user where create_time < ?
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end",endTime);
            Integer totalUser = userMapper.countByMap(map);
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();

    }

    /**
     * 订单数据统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        // 用集合存放begin到end范围内的每天的日期
        List<LocalDate> dateList =new ArrayList<>();

        dateList.add(begin);//加入开始一天
        //将begin+1后面到end全加进去
        while(!begin .equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> orderCountList = new ArrayList<>();//存放每天订单总数
        List<Integer> validOrderCountList = new ArrayList<>();//存放每天有效订单数
        for (LocalDate date : dateList){
            // 查询日期对应的订单总个数，sql: select count(id) from orders where order_time < ? and order_time > ?
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);


            // 查询日期对应的有效订单，sql: select count(id) from orders where order_time < ? and order_time > ? and status = 5
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);

        }

        //计算订单总数
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算有效订单总数
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //计算订单完成率
        Double orderCompletionRate = 0.0;
        if(totalOrderCount != 0){
            orderCompletionRate=validOrderCount.doubleValue() / totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据条件统计订单数量,为上面提供方法
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);
        return orderMapper.countByMap(map);
    }



        /**
         * 销量排名top10
         * @param begin
         * @param end
         * @return
         */
        @Override
        public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
            LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

            List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
            List<String> nameList = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
            String nameListString = StringUtils.join(nameList, ",");
            List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
            String numberList = StringUtils.join(numbers, ",");


            return SalesTop10ReportVO.builder().nameList(nameListString).numberList(numberList).build();
        }

    @Override
    public void exporBusinessDate(HttpServletResponse response) {
        //1.查询数据库,获取营业数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2.通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间:"+dateBegin + "至" + dateEnd);
            //获取第四行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            //获取第五行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessDate = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessDate.getTurnover());
                row.getCell(3).setCellValue(businessDate.getValidOrderCount());
                row.getCell(4).setCellValue(businessDate.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessDate.getUnitPrice());
                row.getCell(6).setCellValue(businessDate.getNewUsers());
            }
            //3.通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }


    }


}
